[llvm-dev] LLVM/Clang version 7.0.0rc2 fails with gcc (Debian 8.2.0-4)

[Sedat Dilek via llvm-dev]

On Mon, Aug 27, 2018 at 6:09 PM, Sedat Dilek <sedat.dilek at gmail.com> wrote:
> Hi,
>
> I have not sent yet any bug-reports to llvm-dev but I am seeing this
> build-failure:
>
> ...
> [574/3685] Building CXX object
> lib/Bitcode/Reader/CMakeFiles/LLVMBitReader.dir/MetadataLoader.cpp.o
> FAILED: lib/Bitcode/Reader/CMakeFiles/LLVMBitReader.dir/MetadataLoader.cpp.o
> /usr/bin/g++-8  -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GNU_SOURCE
> -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
> -Ilib/Bitcode/Reader
> -I/home/sdi/src/llvm-toolchain/llvm/lib/Bitcode/Reader -Iinclude
> -I/home/sdi/src/llvm-toolchain/llvm/include -fPIC
> -fvisibility-inlines-hidden -Werror=date-time -std=c++11 -Wall -Wextra
> -Wno-unused-parameter -Wwrite-strings -Wcast-qual
> -Wno-missing-field-initializers -pedantic -Wno-long-long
> -Wno-maybe-uninitialized -Wno-class-memaccess
> -Wdelete-non-virtual-dtor -Wno-comment -fdiagnostics-color
> -ffunction-sections -fdata-sections -O3    -UNDEBUG  -fno-exceptions
> -fno-rtti -MD -MT
> lib/Bitcode/Reader/CMakeFiles/LLVMBitReader.dir/MetadataLoader.cpp.o
> -MF lib/Bitcode/Reader/CMakeFiles/LLVMBitReader.dir/MetadataLoader.cpp.o.d
> -o lib/Bitcode/Reader/CMakeFiles/LLVMBitReader.dir/MetadataLoader.cpp.o
> -c /home/sdi/src/llvm-toolchain/llvm/lib/Bitcode/Reader/MetadataLoader.cpp
> /home/sdi/src/llvm-toolchain/llvm/lib/Bitcode/Reader/MetadataLoader.cpp:
> In member function 'llvm::Error
> llvm::MetadataLoader::MetadataLoaderImpl::parseOneMetadata(llvm::SmallVectorImpl<long
> unsigned int>&, unsigned int,
> {anonymous}::{anonymous}::PlaceholderQueue&, llvm::StringRef, unsigned
> int&)':
> /home/sdi/src/llvm-toolchain/llvm/lib/Bitcode/Reader/MetadataLoader.cpp:1771:1:
> internal compiler error: Segmentation fault
>  }
>  ^
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <file:///usr/share/doc/gcc-8/README.Bugs> for instructions.
>
> root at inizai# gcc --version
> gcc (Debian 8.2.0-4) 8.2.0
> Copyright (C) 2018 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions.  There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>
> Is that a known issue?
> Any workoround or fix available?
>

Building with my selfmade llvm-toolchain was successful.
So this seems to be a GCC bug.

Interesting is that building with LLVM/Clang reduces disk-usage
(default compression-level for gzip):

root at iniza:/opt/archives# du -m *.tar.gz
353     llvm-toolchain-7.0.0rc2.tar.gz
468     llvm-toolchain-7.0.0.tar.gz

- Sedat -